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from prometheus_client import start_http_server, Counter, Summary, Histogram
import time
class PrometheusHelper:
def __init__(self):
self.request_counter = Counter('app_requests_total', 'Total number of requests')
self.successful_requests_counter = Counter('app_successful_requests_total', 'Total number of successful requests')
self.failed_requests_counter = Counter('app_failed_requests_total', 'Total number of failed requests')
self.request_duration_summary = Summary('app_request_duration_seconds', 'Time spent processing request')
self.comic_frequency = Counter('comic_frequency', 'Frequency of comics being selected', ['comic_id'])
self.index_build_start_time = None
self.index_build_duration = Summary('index_build_duration_seconds', 'Time spent building the index')
self.faiss_index_search_start_time = None
self.faiss_index_search_duration = Summary('faiss_index_search_duration_seconds', 'Time spent searching the index')
self.chat_model_call_start_time = None
self.chat_model_call_duration = Summary('chat_model_call_duration_seconds', 'Time spent calling the chat model')
# self.frequency_histogram = Histogram('comic_frequency', 'Frequency of comics being selected')
def start_faiss_index_search_timer(self):
self.faiss_index_search_start_time = time.time()
def stop_faiss_index_search_timer(self):
self.faiss_index_search_duration.observe(time.time() - self.faiss_index_search_start_time)
def start_chat_model_call_timer(self):
self.chat_model_call_start_time = time.time()
def stop_chat_model_call_timer(self):
self.chat_model_call_duration.observe(time.time() - self.chat_model_call_start_time)
def record_request(self, success: bool):
self.request_counter.inc()
if success:
self.successful_requests_counter.inc()
else:
self.failed_requests_counter.inc()
def start_index_build_timer(self):
self.index_build_start_time = time.time()
def stop_index_build_timer(self):
self.index_build_duration.observe(time.time() - self.index_build_start_time)
def setup_prometheus(self):
start_http_server(8000)
def start_request_timer(self):
self.start_time = time.time()
def stop_request_timer(self):
self.request_duration_summary.observe(time.time() - self.start_time)
def record_frequency(self, comic_id: int):
self.comic_frequency.labels(comic_id=comic_id).inc()
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